A technical diver handling decompression stage cylinders during a dive

Photo by Teemu Virtanen · CC BY-SA 3.0

OC Tech (51m)IANTD

Technical Diver

Official course standards ↗Last updated September 7, 2026

Deep open-circuit technical diving to 180 fsw (55 msw) using custom-blended nitrox and trimix gas mixtures for extended bottom time and optimal decompression. Candidates gain comprehensive knowledge of EANx operating limits and the application of enriched air and pure oxygen for optimized decompression procedures. This certification unlocks technical wreck, cave, and depth-extension training; it's the foundation for all open-circuit technical specializations.

Centres that teach this course

11 dive centres in the directory publish a price for this exact certification, checked Sep 2026. Each centre's own wording is shown beneath its name. Ranges cover whole-course prices only — where a centre charges per day or per dive, its rate is listed separately below, since a daily figure is not comparable with a course total.

THB 30,000 – THB 35,000across 5 centres pricing in Thai Bahtfrom ≈ $895
€690 – €850across 3 centres pricing in Eurofrom ≈ $774
IDR 15,000,000 – IDR 17,500,000across 2 centres pricing in Indonesian Rupiahfrom ≈ $836
One centre publishes a price in US Dollar.
  • Horizon DiversUnited States
    Extended Range / Trimix (TDI or IANTD)one price, several agencies
    $1,600
    total

Same training under a different agency

26 centres

A separate set of centres, teaching Extended Range under a different agency. These are not the same certification — the standards and the card differ — but they cover the same depth and scope, which is why centres price them alike. Every row here names whose rating it is, and none of them is counted above.

€500 – €850across 11 centres pricing in Eurofrom ≈ $561

Charged by the day or dive rather than as a course price:

IDR 10,000,000 – IDR 20,700,000across 8 centres pricing in Indonesian Rupiahfrom ≈ $557
  • Bali Dive TrekIndonesia
    SSI Technical Extended RangeSSI XR
    IDR 20,700,000
    total
  • Bali Dive TrekIndonesia
    RAID Deco 50 DiverRAID
    IDR 17,500,000
    total
  • Gili DiversIndonesia
    Advanced Decompression Diver (50m)RAID
    IDR 10,000,000
    total
  • Gili DiversIndonesia
    Extended Decompression Diver (55m)RAID
    IDR 15,000,000
    total
  • Bali Dive TrekIndonesia
    TDI Extended RangeTDI
    IDR 20,700,000
    total
  • Blue Marlin TechIndonesia
    Extended RangeTDI
    IDR 15,000,000
    total
  • Manta DiveIndonesia
    TDI Extended RangeTDI
    IDR 12,500,000
    total
  • Trawangan DiveIndonesia
    TDI Extended Range DiverTDI
    IDR 12,600,000
    total
$950 – $1,400across 3 centres pricing in US Dollar

Charged by the day or dive rather than as a course price:

  • Cave AdventurersUnited States
    Extended RangeTDI
    Private class$450/day→ $1,350 for the 3-day minimum
    Group class$350/day→ $1,050 for the 3-day minimum each
    $450
    per day
  • Horizon DiversUnited States
    PADI Tec 50 DiverPADI TecRec
    $1,000
    per person
  • Divers UnderGroundMexico
    TDI Extended RangeTDI
    $325/day
    $325
    per day
  • Under The JungleMexico
    Extended RangeTDI
    private$345/day→ $1,380 for the 4-day minimum
    per diver in a group$295/day→ $1,180 for the 4-day minimum each
    $345
    per day
THB 25,000 – THB 44,900across 4 centres pricing in Thai Bahtfrom ≈ $746
₱32,950 – ₱54,000across 2 centres pricing in Philippine Pesofrom ≈ $522
  • Tech AsiaPhilippines
    TDI Extended RangeTDI
    ₱54,000
    total
  • Tech AsiaPhilippines
    PADI Tec 50PADI TecRec
    ₱32,950
    total
One centre publishes a price in Mexican Peso.

Same tier, agency not stated

7 centres

These centres publish a price for Extended Range, but their own wording does not say which agency's certification it buys — many teach several and name the card only once you enquire, and some price one course for either agency. The figure is comparable; the certification is not identified, so we do not guess at one.

€650 – €900across 3 centres pricing in Eurofrom ≈ $729

Charged by the day or dive rather than as a course price:

  • Ritual DiveMalta
    SSI XR Technical Extended Range
    €200/day→ €1,000 for the 5-day minimum
    €200
    per day
THB 29,000 – THB 44,900across 2 centres pricing in Thai Bahtfrom ≈ $865
One centre publishes a price in Indonesian Rupiah.

These prices are not like-for-like. Two centres can charge very differently for the same certification because they include different things. One price may cover twinsets, stages, deco gas and cylinder rental for every training dive, a dedicated classroom for the theory, boat or transport to the site, and the agency's registration and materials; another may be tuition only, with all of that charged separately — or the other way round, with a centre bundling in extras the first leaves out. Class size, whether the course is one-to-one, and how many days are allowed for it move the figure too. Check what each centre's price includes before comparing them, and confirm with the centre before booking.

Consumables are usually extra. Sorb, helium, O₂ and other fills, park and cenote fees, certification fees and rental are commonly charged on top.

Packages combining several certifications, upgrades from an existing one, and open-ended day rates are excluded — none of them is the standalone price of this course, and including them would move the figures away from what a new student can actually book.

Prerequisites

IANTD Advanced EANx Diver or equivalent; minimum 100 logged dives with at least 30 deeper than 90 fsw (27 msw); minimum 18 years old

Standards

What a diver must demonstrate to pass this course — not always published by the certifying agency.

Gas blending and mixture selection for depth and bottom time, decompression procedures and oxygen toxicity management, single and multi-gas-switch scenarios, emergency procedures at depth and during decompression, buoyancy and trim at technical depths

Instructors Teaching This Course

Dive Centres Offering This Course

We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.

Common questions about IANTD Technical Diver

How much does IANTD Technical Diver cost?

Published prices for IANTD Technical Diver range across 11 centres in the TecDiveTools directory — roughly US$750 to US$1,600 at current exchange rates. In each centre's own currency: THB 30,000–35,000 (5 centres), €690–€850 (3 centres), IDR 15,000,000–17,500,000 (2 centres) and $1,600 (1 centre). Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.

How long does IANTD Technical Diver take?

Between 3 and 5 days, based on the durations 5 centres publish for it. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.

What are the prerequisites for IANTD Technical Diver?

IANTD's standards require: IANTD Advanced EANx Diver or equivalent; minimum 100 logged dives with at least 30 deeper than 90 fsw (27 msw); minimum 18 years old.

What is the minimum age for IANTD Technical Diver?

IANTD's standards state: Minimum 18 years old.

How many dives do I need before starting IANTD Technical Diver?

IANTD's standards state: Minimum 100 logged dives with at least 30 deeper than 90 fsw (27 msw).

What does IANTD Technical Diver training involve?

According to IANTD's published standards: Gas blending and mixture selection for depth and bottom time, decompression procedures and oxygen toxicity management, single and multi-gas-switch scenarios, emergency procedures at depth and during decompression, buoyancy and trim at technical depths.

What is the equivalent of IANTD Technical Diver in other agencies?

At the same tier in TecDiveTools' cross-agency comparison: RAID Advanced Decompression, RAID Extended Decompression, TDI Extended Range, PSAI Extended Range Nitrox and PADI TecRec Tec 50. They cover comparable training, but each agency sets its own standards, depth limits and certification card, so they are comparable rather than interchangeable — check which one your next course accepts.

RAID Advanced DecompressionRAID Extended DecompressionTDI Extended RangePSAI Extended Range NitroxPADI TecRec Tec 50

What course comes after IANTD Technical Diver?

The next step in IANTD's progression is IANTD Normoxic Trimix Diver.

IANTD Normoxic Trimix Diver

Where can I take IANTD Technical Diver?

51 dive centres and 73 instructors in the TecDiveTools directory teach IANTD Technical Diver, in Mexico, the United States, Thailand and Indonesia. Each is listed further up this page.

Does the price of IANTD Technical Diver include gas and equipment?

Not always — it varies by centre. Certification fees, equipment rental and boat or site fees are commonly charged on top of the course price. Each centre's price list on TecDiveTools shows what it notes as included.

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